They are money up front...
But price out a pair of coil covers, springs (assuming you get the right rates the first puchase), bumps and cans, and if you want it stable price out a sway bar. I bet all that added up is more then a pair of struts. And with the struts you don't need bumps or a sway bar.
If or when I get around to SAS my explorer it will get struts.